JPH08285051A - Chain sprocket shock absorber - Google Patents
Chain sprocket shock absorberInfo
- Publication number
- JPH08285051A JPH08285051A JP11263695A JP11263695A JPH08285051A JP H08285051 A JPH08285051 A JP H08285051A JP 11263695 A JP11263695 A JP 11263695A JP 11263695 A JP11263695 A JP 11263695A JP H08285051 A JPH08285051 A JP H08285051A
- Authority
- JP
- Japan
- Prior art keywords
- elastic body
- sprocket
- peripheral side
- side elastic
- chain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/30—Chain-wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/30—Chain-wheels
- F16H2055/306—Chain-wheels with means providing resilience or vibration damping in chain sprocket wheels
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車、バイクまたは
産業用機械等に幅広く利用されているチェーン・スプロ
ケットの緩衝装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain / sprocket shock absorber widely used in automobiles, motorcycles or industrial machines.
【０００２】[0002]
【従来の技術】図８に示すように、従来のチェーンスプ
ロケット緩衝装置においては、スプロケット５１の歯を
成す凹部５２の底部分（歯底部分）に限って、弾性体５
３が設けられている（例えば、特公昭６０−１５８２０
号公報参照）。2. Description of the Related Art As shown in FIG. 8, in a conventional chain sprocket shock absorber, an elastic member 5 is provided only in a bottom portion (tooth bottom portion) of a recess 52 forming a tooth of a sprocket 51.
3 are provided (for example, Japanese Patent Publication No. 60-15820).
(See the official gazette).
【０００３】したがってこのチェーンスプロケット緩衝
装置によると、スプロケット５１の凹部５２の内面に、
弾性体５３が設けられた部分と、弾性体５３が設けられ
ていない部分とが併せて設けられていて、後者の弾性体
５３が設けられていない部分については、チェーンのロ
ーラ（図示せず）が何ら緩衝されることなく直接この部
分に接触するために、接触に伴って大きな振動または騒
音が発生する問題がある。Therefore, according to this chain sprocket shock absorber, the inner surface of the recess 52 of the sprocket 51 is
A portion provided with the elastic body 53 and a portion not provided with the elastic body 53 are provided together, and in the latter portion where the elastic body 53 is not provided, a chain roller (not shown) However, there is a problem that a large vibration or noise is generated due to the contact, because the contact directly contacts this portion without any buffering.
【０００４】[0004]
【発明が解決しようとする課題】本発明は以上の点に鑑
み、スプロケットとチェーンの接触に伴う振動または騒
音の発生を極力抑えるようにしたチェーンスプロケット
緩衝装置を提供することを目的とする。SUMMARY OF THE INVENTION In view of the above points, it is an object of the present invention to provide a chain sprocket shock absorber which suppresses the generation of vibration or noise due to contact between the sprocket and the chain as much as possible.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明のチェーンスプロケット緩衝装置は、スプロ
ケットの歯を成す凹部の略全体に、その歯形に沿って弾
性体を食み出させることにした。In order to achieve the above object, the chain sprocket shock absorber of the present invention has an elastic body protruding along substantially the entire tooth recess of the sprocket along its tooth profile. did.
【０００６】[0006]
【作用】上記構成を備えた本発明のチェーンスプロケッ
ト緩衝装置のように、スプロケットの歯を成す凹部の略
全体に、その歯形に沿って弾性体が食み出していると、
凹部の内面に、弾性体が設けられた部分のみが設けられ
ることになる。したがって凹部の内面に弾性体が設けら
れていない部分がなく、この部分にチェーンのローラが
接触することがないために、スプロケットとチェーンの
接触に伴って発生する振動または騒音を従来より小さく
することが可能となる。尚、「凹部の略全体」は略円弧
形を呈する歯形に沿っての話であって、歯の幅方向につ
いては、その一部に弾性体が設けられていれば良い。As in the chain sprocket shock absorbing device of the present invention having the above-described structure, when the elastic body protrudes along the tooth profile of substantially the entire concave portion forming the teeth of the sprocket,
Only the portion provided with the elastic body is provided on the inner surface of the recess. Therefore, there is no part where the elastic body is not provided on the inner surface of the concave part, and the roller of the chain does not contact this part, so the vibration or noise generated due to the contact between the sprocket and the chain should be made smaller than before. Is possible. Note that "substantially the whole of the recessed portion" is a story along a tooth profile having a substantially arc shape, and in the width direction of the tooth, an elastic body may be provided in a part thereof.
【０００７】[0007]
【実施例】つぎに本発明の実施例を図面にしたがって説
明する。Embodiments of the present invention will now be described with reference to the drawings.
【０００８】第一実施例・・・図１ないし図３に示すよ
うに、スプロケット１の歯を成す凹部４の略全体に、そ
の歯形に沿って弾性体７が食み出しており、弾性体７
が、ゴムよりなる内周側弾性体８と、樹脂よりなる外周
側弾性体９とから構成されている。First Embodiment: As shown in FIGS. 1 to 3, an elastic body 7 protrudes along the tooth profile of the recess 4 forming the teeth of the sprocket 1, and the elastic body 7 is protruded. 7
Is composed of an inner elastic body 8 made of rubber and an outer elastic body 9 made of resin.
【０００９】金属等剛材製のスプロケット本体２に、幅
方向（図１において紙面と直交する方向、図２および図
３において左右方向）一対の歯部３が設けられ、この歯
部３に、スプロケット１の歯を成す凹部４と、凸部５と
が周方向に交互に設けられ、一対の歯部３の間に、外径
寸法（溝底の外径寸法）ａを全周に亙って均一に設定さ
れた環状の溝部６が設けられ、この溝部６の底部に環状
の内周側弾性体８が装着され、同じく溝部６の内部であ
って内周側弾性体８の外周側に環状の外周側弾性体９が
装着され、内周側弾性体８の内径寸法ｂ、内周側弾性体
８の外径寸法ｃおよび外周側弾性体９の内径寸法ｄはそ
れぞれ全周に亙って均一に設定されているが、外周側弾
性体９の外径は、その形状に関して、凹部１０と凸部１
１とが凹部４および凸部５と同じピッチで周方向に交互
に並べられ、凹部１０の歯形が凹部４の歯形より一回り
小さく設定され、これにより凹部４の略全体に、その歯
形に沿って外周側弾性体９が略等幅ｅで食み出してい
る。外周側弾性体９の最大外径寸法ｆは、スプロケット
本体２の最大外径寸法ｇと略同じに設定され、これによ
り外周側弾性体９が、凹部４に限って、その略全体に食
み出している。A sprocket body 2 made of a rigid material such as metal is provided with a pair of tooth portions 3 in the width direction (direction orthogonal to the paper surface in FIG. 1, left and right direction in FIGS. 2 and 3). The concave portions 4 and the convex portions 5 forming the teeth of the sprocket 1 are alternately provided in the circumferential direction, and the outer diameter dimension (outer diameter dimension of the groove bottom) a is provided over the entire circumference between the pair of tooth portions 3. Is provided with an annular groove portion 6 that is uniformly set, and an annular inner peripheral side elastic body 8 is attached to the bottom portion of the groove portion 6. Similarly, inside the groove portion 6 and on the outer peripheral side of the inner peripheral side elastic body 8. An annular outer peripheral side elastic body 9 is mounted, and an inner peripheral side elastic body 8 has an inner diameter dimension b, an inner peripheral side elastic body 8 has an outer diameter dimension c, and an outer peripheral side elastic body 9 has an inner diameter dimension d over the entire circumference. Although the outer diameter of the outer peripheral side elastic body 9 is set to be uniform,
1 and 1 are alternately arranged at the same pitch as the concave portions 4 and the convex portions 5 in the circumferential direction, and the tooth profile of the concave portion 10 is set to be slightly smaller than the tooth profile of the concave portion 4, whereby substantially the entire concave portion 4 is formed along the tooth profile. The outer peripheral side elastic body 9 protrudes with a substantially equal width e. The maximum outer diameter dimension f of the outer peripheral side elastic body 9 is set to be substantially the same as the maximum outer diameter dimension g of the sprocket body 2, so that the outer peripheral side elastic body 9 is limited to the concave portion 4 and almost entirely covers the concave portion 4. I have put it out.
【００１０】上記構成を備えたチェーンスプロケット緩
衝装置においては、スプロケット１の歯を成す凹部４の
略全体に、その歯形に沿って弾性体７が食み出している
ために、凹部４の内面に、弾性体７が設けられた部分の
みが設けられている。したがって凹部４の内面に弾性体
７が設けられていない部分がなく、この部分にチェーン
のローラ（図示せず）が接触することがないために、ス
プロケット１とチェーンの接触に伴って発生する振動ま
たは騒音を従来より小さくすることができる。すなわ
ち、弾性体７が従来のように径方向のみでなく、トルク
方向（周方向）についても緩衝作用を奏し、この分、緩
衝効果が高められている訳である。また弾性体７がゴム
製の内周側弾性体８と樹脂製の外周側弾性体９とから構
成されているために、内周側弾性体８によって緩衝性に
優れ、外周側弾性体９によって耐摩耗性に優れた緩衝装
置を提供することができる。In the chain sprocket shock absorber having the above-described structure, the elastic body 7 is protruded along the tooth profile of the recess 4 forming the teeth of the sprocket 1, so that the inner surface of the recess 4 is covered. , Only the portion where the elastic body 7 is provided is provided. Therefore, since there is no portion where the elastic body 7 is not provided on the inner surface of the concave portion 4 and the roller (not shown) of the chain does not come into contact with this portion, the vibration generated due to the contact between the sprocket 1 and the chain. Alternatively, the noise can be reduced as compared with the conventional one. That is, the elastic body 7 exerts a cushioning function not only in the radial direction as in the conventional case, but also in the torque direction (circumferential direction), and the cushioning effect is enhanced accordingly. Further, since the elastic body 7 is composed of the rubber inner peripheral side elastic body 8 and the resin outer peripheral side elastic body 9, the inner peripheral side elastic body 8 is excellent in cushioning property, and the outer peripheral side elastic body 9 A shock absorber having excellent wear resistance can be provided.
【００１１】第二実施例・・・図４および図５に示すよ
うに、スプロケット１の歯を成す凹部４の略全体に、そ
の歯形に沿って弾性体７が食み出しており、弾性体７
が、ゴムよりなる内周側弾性体８と、樹脂よりなる外周
側弾性体９とから構成されている。Second Embodiment: As shown in FIGS. 4 and 5, an elastic body 7 is protruded along the tooth profile of the recess 4 forming the teeth of the sprocket 1, and the elastic body 7 is protruded. 7
Is composed of an inner elastic body 8 made of rubber and an outer elastic body 9 made of resin.
【００１２】金属等剛材製のスプロケット本体２に、幅
方向（図４において紙面と直交する方向、図５において
左右方向）一対の歯部３が設けられ、この歯部３に、ス
プロケット１の歯を成す凹部４と、凸部５とが周方向に
交互に設けられ、一対の歯部３の間に、外径寸法（溝底
の外径寸法）ａを全周に亙って均一に設定された環状の
溝部６が設けられ、この溝部６の底部に環状の内周側弾
性体８が装着され、図６に示すように、この環状の内周
側弾性体８の外周面に、突起部１２が径方向外方へ向け
て放射状に一体成形されている。この突起部１２は凸部
５と同数が凸部５と同じピッチで設けられ、互いに隣り
合った突起部１２の互いに対向した斜面部１３と、その
間の円弧部１４とによって形成された凹部１５の歯形が
凹部４の歯形より一回り大きく設定され、この凹部１５
にそれぞれ、単品状態を図７に示すような外周側弾性体
９が装着されている。この外周側弾性体９は、円弧部１
６の両端に一対の斜面部１７を一体成形して全体に略Ｖ
字形を呈し、その内側凹部１８の歯形を凹部４の歯形よ
り一回り小さく設定され、これにより凹部４の略全体
に、その歯形に沿って外周側弾性体９が略等幅ｅで食み
出している。内周側弾性体８および所要数の外周側弾性
体９よりなる弾性体７の最大外径寸法ｈは、スプロケッ
ト本体２の最大外径寸法ｇと略同じに設定され、これに
より外周側弾性体９が、凹部４に限って、その略全体に
食み出している。尚、図６は、内周側弾性体８および所
要数の外周側弾性体９よりなる弾性体７の全体を正面か
ら見た図であって、このように先ず、弾性体７を製作し
てから、この弾性体７を、図５に示したように軸方向に
二分割されたスプロケット本体２の間に装着する。A sprocket body 2 made of a rigid material such as metal is provided with a pair of tooth portions 3 in the width direction (direction orthogonal to the paper surface in FIG. 4, left and right direction in FIG. 5). The concave portions 4 and the convex portions 5 forming teeth are alternately provided in the circumferential direction, and the outer diameter dimension (outer diameter dimension of the groove bottom) a is evenly distributed over the entire circumference between the pair of tooth portions 3. The set annular groove portion 6 is provided, and the annular inner peripheral side elastic body 8 is attached to the bottom portion of the groove portion 6, and as shown in FIG. 6, on the outer peripheral surface of the annular inner peripheral side elastic body 8, The protrusions 12 are integrally formed radially outward. The projections 12 are provided in the same number as the projections 5 at the same pitch as the projections 5, and the recesses 15 are formed by the slopes 13 of the projections 12 adjacent to each other and the arcs 14 therebetween. The tooth profile is set to be slightly larger than the tooth profile of the recess 4, and the recess 15
An outer peripheral side elastic body 9 as shown in FIG. 7 is attached to each of them. The outer peripheral side elastic body 9 has an arc portion 1
6, a pair of slopes 17 are integrally formed at both ends of
The tooth shape of the inner concave portion 18 is set to be slightly smaller than the tooth shape of the concave portion 4, so that the outer peripheral side elastic body 9 protrudes along the tooth shape with substantially equal width e along the tooth shape of the concave portion 4. ing. The maximum outer diameter dimension h of the elastic body 7 including the inner peripheral side elastic body 8 and the required number of outer peripheral side elastic bodies 9 is set to be substantially the same as the maximum outer diameter dimension g of the sprocket body 2, whereby the outer peripheral side elastic body is formed. Only in the concave portion 4, 9 protrudes into almost the entire area. FIG. 6 is a view of the entire elastic body 7 including the inner peripheral side elastic body 8 and the required number of outer peripheral side elastic bodies 9 as viewed from the front. In this way, the elastic body 7 is first manufactured. Therefore, the elastic body 7 is mounted between the sprocket bodies 2 which are axially divided into two as shown in FIG.
【００１３】上記構成を備えたチェーンスプロケット緩
衝装置においては、スプロケット１の歯を成す凹部４の
略全体に、その歯形に沿って弾性体７が食み出している
ために、凹部４の内面に、弾性体７が設けられた部分の
みが設けられている。したがって凹部４の内面に弾性体
７が設けられていない部分がなく、この部分にチェーン
のローラ（図示せず）が接触することがないために、ス
プロケット１とチェーンの接触に伴って発生する振動ま
たは騒音を従来より小さくすることができる。すなわ
ち、弾性体７が従来のように径方向のみでなく、トルク
方向（周方向）についても緩衝作用を奏し、この分、緩
衝効果が高められている訳である。また弾性体７がゴム
製の内周側弾性体８と樹脂製の外周側弾性体９とから構
成されているために、内周側弾性体８によって緩衝性に
優れ、外周側弾性体９によって耐摩耗性に優れた緩衝装
置を提供することができる。In the chain sprocket shock absorber having the above structure, since the elastic body 7 protrudes along the tooth profile of the recessed portion 4 forming the teeth of the sprocket 1, the inner surface of the recessed portion 4 is exposed. , Only the portion where the elastic body 7 is provided is provided. Therefore, since there is no portion where the elastic body 7 is not provided on the inner surface of the concave portion 4 and the roller (not shown) of the chain does not come into contact with this portion, the vibration generated due to the contact between the sprocket 1 and the chain. Alternatively, the noise can be reduced as compared with the conventional one. That is, the elastic body 7 exerts a cushioning function not only in the radial direction as in the conventional case, but also in the torque direction (circumferential direction), and the cushioning effect is enhanced accordingly. Further, since the elastic body 7 is composed of the rubber inner peripheral side elastic body 8 and the resin outer peripheral side elastic body 9, the inner peripheral side elastic body 8 is excellent in cushioning property, and the outer peripheral side elastic body 9 A shock absorber having excellent wear resistance can be provided.
【００１４】また上記構成のチェーンスプロケット緩衝
装置によれば、外周側弾性体９が凹部４と同じピッチで
周方向に所要数並べられているとともに、互いに隣り合
った外周側弾性体９の間に内周側弾性体８の突起部１２
が挾まれているために、チェーンが掛かったときの外周
側弾性体９のずれが局部的なものに抑えられ、反対に言
えば、内周側弾性体８の弾性変形が局部的なものに抑え
られる。したがって例えば外周側弾性体９が環状である
第一実施例がそうであるように、内周側弾性体８全体が
絶えず弾性変形して早期に疲労すると言った事態が発生
するのを未然に防止することができ、これにより弾性体
７の耐久性を高めることができる。Further, according to the chain sprocket shock absorber having the above-mentioned structure, the outer peripheral side elastic bodies 9 are arranged in the required number in the circumferential direction at the same pitch as the concave portions 4, and between the outer peripheral side elastic bodies 9 adjacent to each other. Protrusion 12 of inner peripheral side elastic body 8
As a result, the deviation of the outer peripheral side elastic body 9 when the chain is hooked is suppressed locally, and conversely, the elastic deformation of the inner peripheral side elastic body 8 is localized. It can be suppressed. Therefore, as in the first embodiment in which the outer peripheral elastic body 9 is annular, for example, the situation in which the entire inner peripheral elastic body 8 is constantly elastically deformed to cause early fatigue is prevented. Therefore, the durability of the elastic body 7 can be improved.
【００１５】[0015]
【発明の効果】本発明は、以下の効果を奏する。The present invention has the following effects.
【００１６】すなわち、上記構成を備えた本発明のチェ
ーンスプロケット緩衝装置においては、スプロケットの
歯を成す凹部の略全体に、その歯形に沿って弾性体が食
み出しているために、凹部の内面に、弾性体が設けられ
た部分のみが設けられている。したがって凹部の内面に
弾性体が設けられていない部分がなく、この部分にチェ
ーンのローラが接触することがないために、スプロケッ
トとチェーンの接触に伴って発生する振動または騒音を
従来より小さくすることができ、制振性および消音性に
優れた緩衝装置を提供することができる。That is, in the chain sprocket cushioning device of the present invention having the above-mentioned structure, the elastic body protrudes substantially along the tooth profile of the recessed portion forming the teeth of the sprocket, so that the inner surface of the recessed portion , Only the portion where the elastic body is provided is provided. Therefore, since there is no part where the elastic body is not provided on the inner surface of the recess and the chain roller does not contact this part, vibration or noise generated due to contact between the sprocket and the chain should be made smaller than before. Therefore, it is possible to provide a shock absorber having excellent vibration damping property and sound deadening property.
【図１】本発明の第一実施例に係るチェーンスプロケッ
ト緩衝装置の要部正面図FIG. 1 is a front view of a main part of a chain sprocket shock absorber according to a first embodiment of the present invention.
【図２】図１におけるＡ−Ａ線断面図FIG. 2 is a sectional view taken along line AA in FIG.
【図３】図１におけるＢ−Ｂ線断面図FIG. 3 is a sectional view taken along line BB in FIG.
【図４】本発明の第二実施例に係るチェーンスプロケッ
ト緩衝装置の正面図FIG. 4 is a front view of a chain sprocket shock absorber according to a second embodiment of the present invention.
【図５】図４におけるＣ−Ｏ−Ｃ線断面図5 is a sectional view taken along the line CC in FIG.
【図６】同実施例に係る弾性体の正面図FIG. 6 is a front view of the elastic body according to the embodiment.
【図７】同実施例に係る外周側弾性体の拡大正面図FIG. 7 is an enlarged front view of an outer peripheral elastic body according to the embodiment.
【図８】従来例に係るチェーンスプロケット緩衝装置の
要部正面図FIG. 8 is a front view of a main part of a chain sprocket shock absorber according to a conventional example.
１ スプロケット ２ スプロケット本体 ３ 歯部 ４，１０，１５ 凹部 ５，１１ 凸部 ６ 溝部 ７ 弾性体 ８ 内周側弾性体 ９ 外周側弾性体 １２ 突起部 １３，１７ 斜面部 １４，１６ 円弧部 １８ 内側凹部 1 Sprocket 2 Sprocket Main Body 3 Teeth 4,10,15 Recess 5,11 Convex 6 Groove 7 Elastic 8 Inner Side Elastic 9 Outer Side Elastic 12 Projection 13,17 Slope 14,16 Circular 18 Inside Recess
Claims (1)
（４）の略全体に、その歯形に沿って弾性体（７）を食
み出させたことを特徴とするチェーンスプロケット緩衝
装置。1. A chain sprocket shock absorber characterized in that an elastic body (7) is protruded along the tooth profile of substantially the entire recess (4) forming the teeth of the sprocket (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11263695A JPH08285051A (en) | 1995-04-14 | 1995-04-14 | Chain sprocket shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11263695A JPH08285051A (en) | 1995-04-14 | 1995-04-14 | Chain sprocket shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08285051A true JPH08285051A (en) | 1996-11-01 |
Family
ID=14591691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11263695A Withdrawn JPH08285051A (en) | 1995-04-14 | 1995-04-14 | Chain sprocket shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08285051A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002097305A1 (en) * | 2001-05-25 | 2002-12-05 | Kone Corporation | Damped chainwheel |
| WO2007109420A1 (en) * | 2006-03-21 | 2007-09-27 | Borgwarner Inc | Chain noise reduction device |
| CN111734811A (en) * | 2020-07-01 | 2020-10-02 | 卢方君 | Sprocket with stable transmission |
| CN111734801A (en) * | 2019-03-25 | 2020-10-02 | 株式会社椿本链条 | Sprocket and drive mechanism |
| CN111750051A (en) * | 2020-07-01 | 2020-10-09 | 卢方君 | High stability prevents sprocket of beating |
-
1995
- 1995-04-14 JP JP11263695A patent/JPH08285051A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002097305A1 (en) * | 2001-05-25 | 2002-12-05 | Kone Corporation | Damped chainwheel |
| WO2007109420A1 (en) * | 2006-03-21 | 2007-09-27 | Borgwarner Inc | Chain noise reduction device |
| CN111734801A (en) * | 2019-03-25 | 2020-10-02 | 株式会社椿本链条 | Sprocket and drive mechanism |
| CN111734801B (en) * | 2019-03-25 | 2024-02-20 | 株式会社椿本链条 | Sprocket and drive mechanism |
| CN111734811A (en) * | 2020-07-01 | 2020-10-02 | 卢方君 | Sprocket with stable transmission |
| CN111750051A (en) * | 2020-07-01 | 2020-10-09 | 卢方君 | High stability prevents sprocket of beating |
| CN111734811B (en) * | 2020-07-01 | 2021-08-27 | 嵊州市非标链轮有限公司 | Sprocket with stable transmission |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020702 |